In this work, we quantitatively and qualitatively compare our QUD structure and RST [1]} since the latter can also be converted to dependency trees [2]}, [3]}, [4]}.
RST represents an article as a tree structure with elementary discourse
units (EDUs, largely clauses) as leaf nodes;
from there, EDUs are recursively grouped together using one of the 78 fine-grained rhetorical relations.
Since QUD structures are marked by free-form questions, the key aspect of “parsing” a QUD structure is thus question generation, and vastly different from RST parsing [5]}, [6]}, [7]}.
